A:k≠﹣1
B:k≠1
C:k≠±1
D:k为一切实数
小明和小华利用如图所示的实验器材,探究物体的浮沉条件,他们探究活动的过程如下:
读“中国地形图”,完成下列各小题。
Because of the bad weather, the travelers had to stop, and decided to a tent for the night. ( )
计算x2•x3的结果为____